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API: Change DTA/TDA add/sub to match numpy #48748

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Merged
merged 6 commits into from
Sep 28, 2022
Merged

API: Change DTA/TDA add/sub to match numpy #48748

merged 6 commits into from
Sep 28, 2022

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jbrockmendel
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Sits on top of #48743

@mroeschke mroeschke added Datetime Datetime data dtype Numeric Operations Arithmetic, Comparison, and Logical operations Timedelta Timedelta data type Non-Nano datetime64/timedelta64 with non-nanosecond resolution labels Sep 26, 2022
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@mroeschke nothing really time-sensitive here, but this is a blocker for constructor stuff

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mroeschke reviewed Sep 27, 2022
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Could you also add a test where the ts + td could be downcast to a lower resolution but isn't?

e.g.

Timestamp(year=2022, month=1, day=1, microsecond=999999) + Timedelta(microseconds=1) remains micro?

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Added test_addition_doesnt_downcast_reso

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Added test_addition_doesnt_downcast_reso

Thanks. Just merged #48743 which I release was supposed to be the Timestamp/Timedelta change.

Could you add a similar dont downcast test for DTA/TDA?

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test added + green

@mroeschke mroeschke added this to the 1.6 milestone Sep 28, 2022
@mroeschke mroeschke merged commit 0dadc71 into pandas-dev:main Sep 28, 2022
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Thanks @jbrockmendel

@jbrockmendel jbrockmendel deleted the nano-arith-2b branch September 28, 2022 15:43
@mroeschke mroeschke modified the milestones: 1.6, 2.0 Oct 13, 2022
noatamir pushed a commit to noatamir/pandas that referenced this pull request Nov 9, 2022
@jbrockmendel @noatamir
API: Change DTA/TDA add/sub to match numpy (pandas-dev#48748)
29676d2 
* API: Change Timestamp/Timedelta arithmetic to match numpy

* fix interval test

* DTA/TDA add/sub upcast instead of downcast

* test for no-downcasting

* add test
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@mroeschke mroeschke mroeschke approved these changes

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Datetime Datetime data dtype Non-Nano datetime64/timedelta64 with non-nanosecond resolution Numeric Operations Arithmetic, Comparison, and Logical operations Timedelta Timedelta data type
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@jbrockmendel @mroeschke